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How could you magnetise a needle to make your own compass?
Rub the needle across a magnetic surface...always in the same direction, don't go back and forth. This will magnetise the needle. Then float the needle in a dish of water. And presto you have your own compass
How do you magnetise a needle?
You can magnetize a needle by rubbing it against a magnet in one direction multiple times. This process aligns the magnetic domains within the needle to create a magnetic field. Alternatively, you can use a strong electrical current to induce magnetization in the needle.
Should you used the steel bowl or the glass bowl to magnetise a needle?
You should use a steel bowl to magnetize a needle. Steel, being ferromagnetic, can enhance the magnetic field and help align the needle's domains, effectively magnetizing it. In contrast, a glass bowl is non-magnetic and will not contribute to the magnetization process.
How can you magnetise a needle?
There are several ways. 1. Stroke the needle in one direction, with another magnet. 2. Place it in a coil of wire and pass a large (DC) current through the coil for a few seconds. (This is how they would do it commercially) 3. Align the needle with the magnetic north/south direction, now hit it several times. It will eventually take on the earths magnetic field as it's own.
What are hard and soft materials?
The magnetic materials which can magnetise and de-magnetise easily are called "soft magnetic materials" example:-ferrites,iron-cobalt alloy. The magnetic materials which cannot magnetise and de-magnetise easily are called "hard magnetic materials" example:-aluminium(al),nickel-cobalt alloy.
How can you magnetise an iton needle permanently using a strong bar magnet?
Rub the iron needle along one direction on the strong bar magnet repeatedly until it becomes magnetized. Make sure to always rub it in the same direction to ensure a consistent magnetic field. This process aligns the magnetic domains within the iron needle, causing it to become permanently magnetized.
What metal is easier to magnetise iron or steel?
Iron.
What kind of needle holder would you use to hold a CT needle?
mayo needle holder
What is the verb form for magnet?
The verb form for "magnet" is "magnetize."
What is the only time that electromagnets magnetise?
Electromagnets are only magnetised while the electrical current is switched on.
What does move the needle mean?
Make a significant difference. This would be referring to the needle of a measurement instrument; moving the needle would be really showing up on the measurement scale.
How would you Used needle in a sentence?
That was like looking for a needle in a haystack of needles!
